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| author | Heiko Carstens <hca@linux.ibm.com> | 2020-07-20 14:16:03 +0200 |
|---|---|---|
| committer | Heiko Carstens <hca@linux.ibm.com> | 2020-07-22 17:02:08 +0200 |
| commit | 555701a714f77e01490f633c1080cf97f0ede1f0 (patch) | |
| tree | 189bf362aaf4b19b870ba5fb8f7b27ed1200fdfc /arch/s390 | |
| parent | 58e15716feb562cdba57e99d62c525a1faa37c08 (diff) | |
s390/time: select CLOCKSOURCE_VALIDATE_LAST_CYCLE
The value returned by read_tod_clock() will overflow on September 17th 2042.
To avoid that system time jumps back select CLOCKSOURCE_VALIDATE_LAST_CYCLE
which enables a sanity check in order to prevent negative "delta" values.
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
Diffstat (limited to 'arch/s390')
| -rw-r--r-- | arch/s390/Kconfig | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/s390/Kconfig b/arch/s390/Kconfig index 0df33cffec52..d95d323cf213 100644 --- a/arch/s390/Kconfig +++ b/arch/s390/Kconfig @@ -125,6 +125,7 @@ config S390 select HAVE_ARCH_JUMP_LABEL_RELATIVE select HAVE_ARCH_KASAN select HAVE_ARCH_KASAN_VMALLOC + select CLOCKSOURCE_VALIDATE_LAST_CYCLE select CPU_NO_EFFICIENT_FFS if !HAVE_MARCH_Z9_109_FEATURES select HAVE_ARCH_SECCOMP_FILTER select HAVE_ARCH_SOFT_DIRTY |